[OpenFlash]

Hi guys,
As everyone can probably imagine, the last few months at Vishnu have been eventful. With the release of the single turbo system, fuel system development, and making big horsepower numbers, we have been focused on ways to maximize performance without sacrificing operational safety margin. And with power output well over 700bhp, developing a methanol control system that is capable of keeping things operationally safe was our #1 priority. Without this in place, building a high powered n54 would be impossible. So we went back to the drawing board in December and rewrote the methanol control strategies and developed something which turned out to be EXACTLY what we wanted. Something that would not only allow us to support 150+whp gains (over pump gas map) on our single turbo but would also allow us to develop stock (and upgraded) twin turbo maps that could not only be more aggressive, but also more drivable and responsive. Something that takes full advantage of the Procede's unique hardware design and fully integrated implementation.

What's New:
Before discussing what's new, let's go over what is old. Prior to this release, the Procede/PWM meth combo worked flawlessly and seamlessly. The Procede monitored actual methanol flow reading the raw 0-5v digital signal generated a customized Aquamist flow sensor. With this flow data, the Procede would modify fuel, boost and ignition advance mapping, on the fly, as dictated by user inputted values. In other words, the user would input boost, open loop fuel and ignition advance settings on two different maps. These two maps would define two ends of an aggression range. The less aggressive map would be operational when meth wasn't flowing. And the more aggressive map would be operational when meth was flowing. The transition between the two maps would be progressive (not on/off) and linear with methanol flow with the methanol target value being defined by the user in the Injection Mode user input. As it stood, this was the most well-developed and operationally safe methanol system implementation we have ever seen employed in the aftermarket. Unlike other more conventional methanol injection systems, it did not require a traditional "failsafe" because the Procede was programmed to run the conservative map when methanol didn't flow. So, in essence, the failsafe was the standard map and the more aggressive map would only be in effect when methanol flow was equal to, or greater than, the user-defined methanol flow target (Injection Mode value). And unlike other "integrated" tune/methanol combos this system:
-Adjusted ignition advance set point as a function of meth flow (as opposed to relying on the stock knock control system to reactively trim ignition advance). This meant that it truly adjusting tune aggression instead of simply raising or lowering boost pressure.
-Injected meth by using an Aquamist fast-acting injection valve with constant injection pressure. Which means that it didn't suffer from the ~0.5 second injection lag that all other PPS meth systems suffer from. Instead, it sprayed within 0.003 seconds of demand, ensuring that there was never a situation where methanol flow was lagging behind methanol demand. Those running 6MTs (that require ignition cut/throttle lift) between gears know just how troublesome this lag is.
-Enjoyed a wide dynamic range by being able to meter meth using the PWM controlled fast to meter methanol flow (i.e., X% duty cycle translates to X% of max meth flow) as opposed to PWM controlling a methanol pump that is not only relatively slow to react but when it does, it doesn't have a wide dynamic range by virtue of the nonlinearity of injection pressure and flow. As a result, you essentially get max meth flow or no flow, little in between. And during transitions from no pressure to full pressure, methanol isn't atomized consistently, leading to misfire and other forms of abnormal combustion.

Dynamic Methanol Flow Targets
Instead of waiting for meth to reach the flow target value (Injection Mode), the Procede will now fully transition to the aggressive map values by he time methanol flow reaches the methanol flow target. And instead of the flow target being the same as Injection mode, it is now corrected for Methanol Injector DC%. And this methanol flow target can be datalogged in Debug Byte 7. In the datalogs below, you can see this value change as a function of Methanol Injector DC%. Prior to this firmware, the meth flow target would effectively be equal to the Injection Mode value instead of being constantly adjusted for Methanol Injector DC%.

This datalog captures two quick mid corner throttle lifts. You can clearly see all three methanol channels (Injection DC, actual flow and target flow) follow each other nicely. It was done on our single turbo 335 running four 1.0mm nozzles flowing approx 1300cc/min:


This datalog shows a full throttle 3rd->4th->5th gear No-Lift Shift sequence while running 19-20psi of boost. You can see how meth flow drops to 0 during ignition cuts and IMMEDIATELY starts spraying when called upon (i.e., when ignition is re-enabled). Also important is that meth isn't dumped in all at once. Instead, you can clearly see it transition from moderate flow to flow flow over the course of a few milliseconds. This precise time and engine load referenced control logic ensures consistent combustion during post-shift conditions:


Lean-run Protection
This feature can now also be enabled/programmed. You will need to use User Software v5.34 to enable/adjust it I'll discuss it in another thread later today or tomorrow.


New maps/firmware/user software can be downloaded from HERE

And here's a little video i took today in the rain while driving the 630whp single turbo 335. Who said single turbo cars are hard to throttle modulate? That's a lot of opposite lock

[Fundahl]

The N54 world has come a long way. Thank you for continuing to have the passion to further develop this hardware and software!

[bmwe82]

Wow that's amazing stuff...do you really need 4 large methanol nozzles? A friend is running an hfs-3 with only two 1mm and gets approx 1000ccm with them...should he add two more?

[bryce]

any benefits of the new maps for non-meth guys?

[OpenFlash]

Originally Posted by bryce

any benefits of the new maps for non-meth guys?

Not really. These new maps are almost identical to the previous maps which were identical to the two map releases before that. Needless to say, we have been quite happy with the "new" Aggressive v5 maps. We will be release new maps soon that will have some more significant changes. So think of this update as more of a firmware release than a map update.

Shiv

[OpenFlash]

Originally Posted by bmwe82

Wow that's amazing stuff...do you really need 4 large methanol nozzles? A friend is running an hfs-3 with only two 1mm and gets approx 1000ccm with them...should he add two more?

This only applies to those using our PWM meth kit, not an HSF-3 since it is not controlled by the Procede. That said, this firmware works the same regardless of how much meth (or how many meth nozzles) you are using.

Shiv

[BT#2]

How do I use these new maps with my Basic Meth Kit?

[OpenFlash]

Originally Posted by BT#2

How do I use these new maps with my Basic Meth Kit?

You can still use the maps. But as usual, you will need to use them in PPS meth mode. Which doesn't offer any of the described functionality.

[marcvtec]

The more nipples the better, that's my golden rule, in all situations

[BT#2]

Originally Posted by shiv@vishnu

Which doesn't offer any of the described functionality.

Cool, but will it give me any more powaa than my old Big Tom map?

[OpenFlash]

Originally Posted by BT#2

Cool, but will it give me any more powaa than my old Big Tom map?

Above 6500rpm, there may be less throttle closure. But it is hard to say since I don't remember details of that one-off map.

Shiv

[usc335]

Originally Posted by shiv@vishnu

Not really. These new maps are almost identical to the previous maps which were identical to the two map releases before that. Needless to say, we have been quite happy with the "new" Aggressive v5 maps. We will be release new maps soon that will have some more significant changes. So think of this update as more of a firmware release than a map update.

Shiv

Will there be any map updates for us non-methanol, 91 octane guys still running the 7-29 maps?

[BT#2]

Originally Posted by shiv@vishnu

Above 6500rpm, there may be less throttle closure. But it is hard to say since I don't remember details of that one-off map.

Shiv

So, as I'm shifting @ around 6500 rpm's (like the most others), I'll not be able to notice any big differences then...

[OpenFlash]

Originally Posted by usc335

Will there be any map updates for us non-methanol, 91 octane guys still running the 7-29 maps?

Yes, the 3-13 maps we just posted have been cleared for 91oct usage. All they require is a Rev2.5 or Rev3 Procede.

Shiv

[OpenFlash]

Originally Posted by BT#2

So, as I'm shifting @ around 6500 rpm's (like the most others), I'll not be able to notice any big differences then...

Nope

[BT#2]

Originally Posted by shiv@vishnu

Nope

Bummer...
You really don't like us with the older, easier and more reliable (?) systems...

[EastBayE90]

love the drift location. That traffic circle in the Mexican Country Club is a lot of fun!!!!!!

[OpenFlash]

Originally Posted by BT#2

Bummer...
You really don't like us with the older, easier and more reliable (?) systems...

Sorry but there is nothing more reliable about PPS systems.

Shiv

[BT#2]

Originally Posted by shiv@vishnu

Sorry but there is nothing more reliable about PPS systems.

Shiv

Tuned and raped since April 2007... Reliable or not? You decide...

[EastBayE90]

Originally Posted by BT#2

Tuned and raped since April 2007... Reliable or not? You decide...

The old dudes say the same thing about their carbureted muscle cars. I prefer to be more on the cutting edge. To each is own I suppose.

[BT#2]

Originally Posted by (-(ellblazer420

The old dudes say the same thing about their carbureted muscle cars. I prefer to be more on the cutting edge. To each is own.

The only difference between the carburated guys and me is that my specific engine is an N54.

[OpenFlash]

Ok.. Let's stay on topic

Also, please read the Read Me file in the download folder. One of the tidbits mentioned is that you can run a higher Injection Mode value and still get a solid meth flow indicator light when on boost. My suggestion is to run an Injection Mode value just 2-3 points lower than what you routinely see for maximum meth flow at full boost.

Shiv